Power-transmission mechanism.



mm w p 0 S. SCHAIRER. POWER TRANSMISSION MECHANISM. APPLICATION FILED SEPT. 26, mo.

Patented Oct. 31, 1916..

2 SHEETS-SHEET 1- 0. S. SCHAIRER. POWER TRANSMISSION MECHANISM. APPLICATION FILED SEPT. 26. I9I0.

1 fimfimw Patented Get. 31, I916.

2 SHEETSSHEET 2- ltd @TTO S. SCHAIRER, 01F EDGEWOOD lPdRK, PENNSYLVANIA, ASSIGNOR 1'0 WESTING- HOUSE ELECTRIC AND VANIA.

MANUFACTURING COMPANY, A CORPORATION OF PEN NSYL- JE'OWERTRANSMISSION MECHANISM.

aoaooe.

Specification of Letters Patent.

Patented Uct. 3T, T9116.

Application filed September 26, 1910. Serial No. 583,906.

, tablishing an operative connection between Illa driving and a driven member and for promptly stopping the movement of the driven member upon interruption of the sald operative connection.

Figure l of the accompanying drawing is a side and sectional view of an electric mo tor provided with a device constructed in accordance with the present invention, and

Fig. 2 is an end view of the motor and other parts shown in Fig. 1.

As here shown, the invention 1s employed in connection with an electric motor, though, of course, it may be employed in connection with other drivlng means. The motor shaft 1 is provided with a bearing sleeve 2 that is secured in an end bracket 3 of the motor frame and projects somewhat from the outer face of the said member. Rotatably, mounted upon the projecting end of the sleeve 2, '1s a pulley 4 that is provided, upon its outer annular face, with a clutch member 5, here shown as a washer composed of rubber, cork, or other suitable material. Another clutch member 6, that is adapted to engage the clutch member 5 carried by the pulley 4, is keyed to the shaft 1, so as to rotate therewith and be capable of movement longitudinally thereof, the clutch members being normally maintained out of engagement by means of aspring 7.

The clutch member 6 is adapted to be pressed into engagement with the member 5 by means of an IL-shaped rod 8 that is bodily and longitudinally movable with respect to the axis of the motor. The rod 8 is mounted in a guide provided in a bracket 9 that is secured to the bottom of the motor frame, a set screw 10 being provided in the end of the said member that is adjacent to the clutch member 6 for the purpose of adjusting the pressure applied between the clutch members. The rod '8 is normally maintained in the position shown by means of a helical compression spring 11 that is mterposed between a lug 12 on' the bracket 9 and a collar 13 that is secured to the said rod. Secured to the rod 8, near the bend therein, is a stirrup 14: to which is attached one end of a chain 15 that passes over a pulley l6 suspended from the bracket 9, the parts being so arranged that, when tension is exerted upon the chain 15, the set screw 10, at the end'of the actuating rod 8, bears upon the clutch member 6 and forces it into engagement with the. member 5.

Pivotally, or otherwise operatively, connected to the stirrup 14, is a brake lever 17 that is also pivoted in an extension 18 of the bracket 9, the upper end of the brake lever 17 being forked and provided with shoes 19 that bear against the outer annular face of the pulley and serve to stop the same when the clutch members are not in engagement. The extension 18 of the bracket 9 also serves as a guide for the vertical portion of the actuating rod 8.

It Will be understood that, as the actuating rod 8 is drawn toward the motor by the chain 15 to cause the clutch members 5 and 6 to engage, the brake shoes 19 are raised out of engagement with the annular face of the pulley, and the pulley is thus permitted to rotate freely, whereas, when the actuating rod 8 is released, the spring returns it to the position shown, and also causes the brake shoes to bear upon the annular face of the pulley'and to stop its rotation.

claim as my invention:

1. The combination with a shaft, a pulley and a clutch member loosely mounted there on, of another clutch member rotated by the shaft and movable longitudinally thereof into and out of engagement with the aforesaid member, a clutch actuating rod having an arm rigid therewith adapted to engage the latter clutch member, the said rod being bodily and longitudinally movable in a direction parallel to the shaft, means for normally maintaining the rod in clutch-releasing position, a brake lever actuated by the rod and a brake shoe carried thereby and normally maintained in engagement with the said pulley.

2. The combination with a shaft, a pul ley and a clutch member loosely mounted thereon, of another clutch member rotated by the shaft and movable longitudinally thereof into and out of engagement with the aforesaid member, a clutch-actuating ating rod one end of which is adapted to rod adapted to directly engage the latter engage one of the clutch members, the main clutch member, the said rod being bodily portion of the said rod being bodily and and longitudinally movable in a direction longitudinally movable in a direction paral- 5 parallel to the shaft, a brake lever having a lel to the shaft, and a brake lever having a stationary fulcrum and actuated by the rod stationary fulcrum and one end operatively and a brake shoe carried thereby to engage connected to the clutch-actuating rod.

the said pulley. In testimony whereof, I have hereunto 3. The combination with a shaft, a pulsubscribed my name this 22nd day of Sept, 10 ley and afclutcli1 meriiberl-1 looselky mounteg 1910.-

thereon, '0 anot er 0 utc .mem er rotate by the shaft, the said clutch members being OTTO SCHAIRER relatively movable longitudinally of the Witnesses: shaft into and out of engagement with each B. B. Hmns, 15 other, a substantially L-shaped clutch-actu- M. C. MERZ. 

